One-Pot Solvent-Free Synthesis of N,N-Bis(2-Hydroxyethyl) Alkylamide from Triglycerides Using Zinc-Doped Calcium Oxide Nanospheroids as a Heterogeneous Catalyst

Catalysts

ChanHee Park¹  CheolSang Kim¹  Dinesh Kumar¹ 

[1] Department of Bionanosystem Engineering, Chonbuk National University, Jeonju 561756, Korea;

关键词: nanospheroids;    zinc-doped CaO;    natural triglycerides;    aminolysis;    heterogeneous catalyst;    recyclability;   

DOI  :  10.3390/catal9090774

来源: DOAJ

【 摘 要 】

N,N-Bis(2-hydroxyethyl) alkylamide or fatty acid diethanolamides (FADs) were prepared from a variety of triglycerides using diethanolamine in the presence of different transition metal-doped CaO nanocrystalline heterogeneous catalysts. The Zn-doped Cao nanospheroids were found to be the most efficient heterogeneous catalyst, with complete conversion of natural triglycerides to fatty acid diethanolamide in 30 min at 90 °C. The Zn/CaO nanoparticles were recyclable for up to six reaction cycles and showed complete conversion even at room temperature. The amidation reaction of natural triglycerides was found to follow the pseudo-first-order kinetic model, and the first-order rate constant was calculated as 0.171 min⁻¹ for jatropha oil aminolysis. The activation energy (Ea) and pre-exponential factor (A) for the same reaction were found to be 47.8 kJ mol⁻¹ and 4.75 × 10⁸ min⁻¹, respectively.

【 授权许可】

Unknown